Vehicle with a high-voltage battery

Abstract

A vehicle includes a high-voltage battery which has a housing and at least one battery module arranged in the housing that has multiple battery cells which are electrically connected together via a cell contacting system. Each of the battery cells has a battery cell housing with an emergency degassing opening which opens at a specified cell inner pressure and through which hot or burning gas can be leaked out of the interior of the battery cell housing into the housing of the high-voltage battery in the event of a disruption or damage to individual battery cells. The emergency degassing openings face the cell contacting system and/or a wall of the housing of the high-voltage battery. The cell contacting system and/or the wall of the housing of the high-voltage battery is/are provided with a heat protection layer, at least in the regions in which the emergency degassing openings are arranged.

What is claimed is: 
     
       1. A vehicle having a battery, comprising:
 a housing; 
 a battery module arranged in the housing, the battery module having a plurality of battery cells; and 
 a cell contact system that electrically connects the plurality of battery cells to one another, wherein 
 the battery cells each have a battery cell housing with an emergency ventilation opening which opens at a predefined internal cell pressure and through which hot or burning gas is able to escape from an interior of the battery cell housing into the housing of the battery in an event of a fault with or damage to individual battery cells, 
 the emergency ventilation openings face the cell contact system, 
 the cell contact system is provided with a single heat protection layer at least in regions in which the emergency ventilation openings are arranged, and 
 the heat protection layer consists of a heat protection coating. 
 
     
     
       2. The vehicle according to  claim 1 , wherein
 the cell contact system is arranged between the emergency ventilation openings and a wall of the housing of the battery. 
 
     
     
       3. The vehicle according to  claim 1 , wherein
 the cell contact system has an electrically conductive conductive element that is electrically connected to electrodes of a plurality of battery cells and/or a holding element that carries the conductive element, and 
 the heat protection layer is applied to the conductive element. 
 
     
     
       4. The vehicle according to  claim 1 , wherein
 the heat protection layer is an intumescent layer. 
 
     
     
       5. The vehicle according to  claim 1 , wherein
 the heat protection layer is a ceramic layer or a layer containing ceramic particles. 
 
     
     
       6. The vehicle according to  claim 1 , wherein
 the heat protection layer has a layer thickness of at least 0.1 mm. 
 
     
     
       7. The vehicle according to  claim 1 , wherein
 the emergency ventilation openings are closed off in a gastight manner when an internal pressure of the battery cells is less than the predefined internal cell pressure. 
 
     
     
       8. The vehicle according to  claim 1 , wherein
 the emergency ventilation openings are each formed by an intended breaking point that opens when the predefined internal cell pressure is exceeded. 
 
     
     
       9. The vehicle according to  claim 1 , wherein
 the battery cells are arranged such that the emergency ventilation openings face an upper wall, with respect to a direction of gravity, or a cover of the battery. 
 
     
     
       10. The vehicle according to  claim 1 , wherein
 the heat protection layer does not melt and does not burn up to a temperature of 1300° C. 
 
     
     
       11. The vehicle according to  claim 1 , wherein
 the heat protection layer does not melt and does not burn up to a temperature of 1000° C. 
 
     
     
       12. The vehicle according to  claim 1 , wherein
 the heat protection layer is not perforated and not burned by the hot or burning gas that leaks from the battery cells for a duration of 0.5 minutes at a temperature of up to 2000° C. 
 
     
     
       13. The vehicle according to  claim 1 , wherein
 the heat protection layer is not perforated and not burned by the hot or burning gas that leaks from the battery cells for a duration of 0.5 minutes at a temperature of up to 1600° C. 
 
     
     
       14. The vehicle according to  claim 1 , wherein
 the cell contact system has an electrically conductive conductive element that is electrically connected to electrodes of a plurality of battery cells and/or a holding element that carries the conductive element, and 
 the heat protection layer is applied to the holding element.